Originally Posted by Toe
Just trying to put some perspective on it. All 3 units I have seen had this streaking....it is far from unusual. I would agree that an extreme case like the picture shown recently in this thread is cause for concern.
Either way, you need to chill
I did more testing of mine over the last few hours and my findings are as follows:
I am at a TR of about 1.4, ie min throw for the image I am projecting. However I have the lens aperture clamped down at -13 for now. So take that as you guys please regarding brightness effect on the streaking.
It is clearly visible on my unit from more than just 2-3 feet away (very similar to the pics previously posted) BUT ONLY on text (as far as I can tell).
Lens shift did not have an effect on the streaks as at least one other reported. I should have tested different zoom levels but did not think of that, I simply tested a min throw ratio.
If I try, I can make out the streaks from about 9 feet away, where I am sitting temporarily until my screen is finished. It is not just white on black background, I even saw it on yellow text on blue background.
I will say that the bigger the font/text size, the more easily viewable the streaks are, that much I did notice. It also affected just straight lines, but only at the tips of the lines, not along the length of it, ie it did not really cause bluriness or anything like that.
I have a feeling once I move to final seating position (~13 feet), it will be even less visible, if visible at all. It doesnt really distort/ruin actual moving images as far as I can tell. Actual movies look damn sharp, life-like and depth is unreal (and I need to do some work on on the color settings and then get going on gamma). I will do a bit more testing over the next week once I get the PJ in its final mounted position, but for now will hold onto this unit because from even 5 feet back, the image is crisp, sharp, and any mis-convergence is a non-issue.
That said, if I used this for any type of text-based work or worked with hard angles/shapes or for whatever reasons enjoyed watching scrolling white credits on black backgrounds (I dont
), I would probably send this one back. But for now I am more than willing to take the convergence and focus pluses vs this streaky negative.
If I find any nagging issues once it is permanently mounted and seats are at 10+ feet away, however, I can assure you I will be calling JVC on this, even if it has 50 hours on the lamp at that point because to me it would be a defect that should be covered under warranty even if the lamp was 1000 hours old (as long as I was in a 2 year time period, particularly since this doesnt appear to be a lamp issue but a lens or light engine issue). I don't expect to have to do that because I have a feeling at final seating position, this will be a non-issue; it really is practically a non-issue even at 8-9 feet unless you look hard for it or stare at very large fonts, or unless you think "hey I paid $x,xxx and I want perfection"
EDIT: I didn't take any pics because my point and shoot would probably be worthless and I have no clue how to photograph properly in the dark to capture this stuff.